Lots of people with this problem where BL silk can leave a residue that looks like damage on the TEXTURED PEI plate only, it does actually destroy the smooth plate so don’t print silk on that. The solution is Acetone. Here is my before and after. I used the solid Purple Silk to get this to happen, apparently the BL dual color silk has a less likelihood of doing this to your plate as I found out with a different print.
WARNING: Do not use acetone on the black pei smooth plate or you will erode the surface
CAUTION: May strip the markings from your plate if you have an older plate, use this method sparingly and only when necessary.
I doesn’t appear to damage my plate in any way.
Using 100% acetone with no impurities can actually get the plate cleaner than if you used soap and water. I’ve always noticed that the acetone leaves the plate more “grabby” with my fingers than ANY other cleaning method it is however expensive and because its only used for cleaning ARRI camera optical paths I only have this one bottle.
I poured about fist sized puddle out on the middle of the plate scrubbed in a circular motion, Then washed with soap and water because I used the wrong wipe and it ate some of the wipe and left little white dust all over the texture. Followed up with the correct wipe and another fist sized puddle of acetone and circular motion scrub. Perhaps your plate was made with a different paint because by all means my bambu logo in the middle should be gone.
Upon Closer examination I did find this little square at the front edge of my plate that was made with a different paint and appears a little more eroded compared to the one of the flip side that I didn’t clean with acetone. its also at the edge where not a whole lot of acetone made it to so I am willing to bet if I dabbed some acetone right on this little bit it would indeed take it off. this appears to be the only thing printed on my plate with this acetone sensitive paint.
Very interesting. Mine did not look like that. It look more like the rest of the markings, no difference. I wonder if they have adjusted that paint used for the marker?
Some of the things ULTEM, the industrial trade name for PEI can tolerate quite well:
Acetic-, hydrochloric-, nitric-, sulphuric- and phosphoric acid in all concentrations commonly available to the general pubic.
Sodium hydroxide (drain cleaner) and sodium chloride in low concentrations.
Hydrogen peroxide is all available concentrations.
Mineral oil based fuels and other hydrocarbons are no issues at all.
Acetone, ethyl ether, glycerine and such oxiginated solvents work fine.
Some might be surprised though how well plain old laundry soap bars and a good brush work…
